tower crane parts Name:Gear box,REDUCER Brand:SCM,SYM,YONGMAO. Type :70RCS,55RCS,45RCS. tower crane parts :Name:Gear box,REDUCERBrand:SCM,SYM,YONGMAO.Type :70RCS,55RCS,45RCS Type Output torque Transmission ratio Crown shaving Mechanism JH01500014110 12 +0.32OMD45,RCV95JH0212000163.212 12 +0.5OMD85,RCV120JH07650017610 12 +0.32OMD55,RCV95JH086000164.2910 12 +0.32OMD55,RCV95